Postmark Cost Calculator
Enter emails per month, pick Free / Basic / Pro / Platform or Auto (cheapest paid), and optionally add a dedicated IP ($50/mo, Pro+, often 300k+/mo). Returns base, overage, monthly total and $ per 1,000 emails. Estimates only; postmarkapp.com/pricing prevails.
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Monthly total
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Unit cost
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Breakdown
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Formula: plan base + max(0, emails − 10,000) × overage per 1k + optional dedicated IP. Free $0: 100 emails/mo, no overage. Basic $15 / Pro $16.50 / Platform $18 — each includes 10,000 emails; overage $1.80 / $1.30 / $1.20 per 1,000. Dedicated IP from $50/mo on Pro or Platform, typically gated at 300,000+ emails/mo. “Auto” picks the cheapest paid plan including overage. Examples: Basic 10k → $15; Basic 30k → $15 + 20 × $1.80 = $51; Pro 30k → $16.50 + 20 × $1.30 = $42.50.
Estimates only. Official list prices as of 2026-11-04 (Asia/Shanghai); the provider's pricing page prevails. Sources: Postmark pricing
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How it works
- How is Postmark priced?
- Free is $0 for 100 emails/month with no overage. Basic $15, Pro $16.50 and Platform $18 each include 10,000 emails; extra emails cost $1.80, $1.30 and $1.20 per 1,000 (as of 2026-11-04).
- What does Auto plan selection do?
- It prices Basic, Pro and Platform (base + overage) and picks the cheapest. Example at 30k: Platform $18 + 20 × $1.20 = $42 beats Pro $42.50 and Basic $51.
- What do dedicated IPs cost?
- From $50/month per IP on Pro or Platform. Postmark often gates dedicated IPs at 300,000+ emails/month; the calculator flags volumes below that.
- Does Free allow overage?
- No. Above 100 emails/month you must upgrade. There is no paid overage on Free.
- How does Postmark compare to Mailgun and SES?
- Use the transactional email API cost comparison for the same volume on SES, Resend, Mailgun Auto and Postmark. Standalone Mailgun and SES calculators are linked in the related tools.